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NastyaZ215
@NastyaZ215
July 2022
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пожалуйста, помогите срочно!!!20 баллов
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Panba121212
3)
Y (x+3) +z (x+3) = (y+z) (x+3)
0 votes
Thanks 0
keized
1. 3a³b-12a²b+6ab=3ab(a²-4a+2)
2. x(x-1)+2(x-1)=(x+2)(x-1)
3. xy+3y+xz+3z=x(y+z)+3(y+z)=(x+3)(y+z)
4. 25-c²=(5-c)(5+c)
5. ab²-2abc+ac²=a(b²-2bc+c²)=a(b-c)²
6.
7. (a-2)(a+2)-a(a-1)=a²-4-a²+a=a-4
8. (2x+8)²=0
2x+8=0
2x=-8
x=-8/2
x=-4
ответ -4
9. x²-4x=0
x(x-4)=0
x=0
или
x-4=0
x=4
ответ 4 и 0
1 votes
Thanks 1
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Answers & Comments
Y (x+3) +z (x+3) = (y+z) (x+3)
2. x(x-1)+2(x-1)=(x+2)(x-1)
3. xy+3y+xz+3z=x(y+z)+3(y+z)=(x+3)(y+z)
4. 25-c²=(5-c)(5+c)
5. ab²-2abc+ac²=a(b²-2bc+c²)=a(b-c)²
6.
7. (a-2)(a+2)-a(a-1)=a²-4-a²+a=a-4
8. (2x+8)²=0
2x+8=0
2x=-8
x=-8/2
x=-4
ответ -4
9. x²-4x=0
x(x-4)=0
x=0
или
x-4=0
x=4
ответ 4 и 0